Cognitive behavioural therapy (CBT) can help you make sense of overwhelming problems by breaking them down into smaller parts.

In CBT, problems are broken down into five main areas:

SituationsThoughtsEmotionsPhysical feelingsActions

CBT is based on the concept of these five areas being interconnected and affecting each other. For example, your thoughts about a certain situation can often affect how you feel both physically and emotionally, as well as how you act in response.

There are helpful and unhelpful ways of reacting to a situation, often determined by how you think about them and CBT can help you stop negative thought cycles.

For example, if your marriage has ended in divorce, you might think you have failed and that you are not capable of having another meaningful relationship.

This could lead to you feeling hopeless, lonely, depressed and tired, so you stop going out and meeting new people. You become trapped in a negative cycle, sitting at home alone and feeling bad about yourself. But rather than accepting this way of thinking you could accept that many marriages end, learn from your mistakes and move on, and feel optimistic about the future. This optimism could result in you becoming more socially active and you may start evening classes and develop a new circle of friends.

This is a simplified example, but it illustrates how certain thoughts, feelings, physical sensations and actions can trap you in a negative cycle and even create new situations that make you feel worse about yourself.

CBT aims to stop negative cycles such as these by breaking down things that make you feel bad, anxious or scared. By making your problems more manageable, CBT can help you change your negative thought patterns and improve the way you feel.CBT can help you get to a point where you can achieve this on your own and tackle problems without the help of a therapist.

Exposure therapy is a form of CBT particularly useful for people with phobias or obsessive compulsive disorder (OCD).

In such cases, talking about the situation is not as helpful and you may need to learn to face your fears in a methodical and structured way through exposure therapy.

Exposure therapy involves starting with items and situations that cause anxiety, but anxiety that you feel able to tolerate. You need to stay in this situation for one to two hours or until the anxiety reduces for a prolonged period by a half.

Your therapist will ask you to repeat this exposure exercise three times a day. After the first few times, you will find your anxiety does not climb as high and does not last as long. You will then be ready to move to a more difficult situation. This process should be continued until you have tackled all the items and situations you want to conquer.

Exposure therapy may involve spending 6 to 15 hours with the therapist, or can be carried out using self-help books or computer programmes. You will need to regularly practice the exercises as prescribed to overcome your problems.

CBT can be carried out with a therapist in one-to-one sessions or in groups with other people in a similar situation to you. If you have CBT on an individual basis, you will usually meet with a CBT therapist for between 5 and 20 weekly or fortnightly sessions, with each session lasting 30-60 minutes.

Exposure therapy sessions will usually last longer to ensure your anxiety reduces during the session. The therapy may take place in a clinic, outside (if you have specific fears there) or in your own home (particularly if you have agoraphobia or OCD involving a specific fear of items at home).

The first few sessions will be spent making sure CBT is the right therapy for you, and that you are comfortable with the process. The therapist will ask questions about your life and background. If you are anxious or depressed, the therapist will ask whether it interferes with your family, work and social life. They will also ask about events that may be related to your problems, treatments you have had, and what you would like to achieve through therapy.

If CBT seems appropriate, the therapist will let you know what to expect from a course of treatment. If it is not appropriate, or you do not feel comfortable with it, they can recommend alternative treatments.

After the initial assessment period, you will start working with your therapist to break down problems into their separate parts – the situation, thoughts, emotions, physical feelings and actions. To help with this, your therapist may ask you to keep a diary or write down your thought and behaviour patterns.

You and your therapist will analyse your thoughts, feelings and behaviours to work out if they are unrealistic or unhelpful and to determine the effect they have on each other and on you. Your therapist will be able to help you work out how to change unhelpful thoughts and behaviours.

After working out what you can change, your therapist will ask you to practise these changes in your daily life. This may involve questioning upsetting thoughts and replacing them with more helpful ones, or recognising when you are going to do something that will make you feel worse and instead doing something more helpful. You may be asked to do some 'homework' between sessions to help with this process.

At each session, you will discuss with your therapist how you have got on with putting the changes into practice and what it felt like. Your therapist will be able to make other suggestions to help you.

Confronting fears and anxieties can be very difficult. Your therapist will not ask you to do things you do not want to do and will only work at a pace you are comfortable with. During your sessions, your therapist will check you are comfortable with the progress you are making.

One of the biggest benefits of CBT is that after your course has finished, you can continue to apply the principles learned to your daily life. This should make it less likely that your symptoms will return.